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参数资料
| 型号： | MAX9929FAUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| -3db带宽： | 150kHz |
| 电流 - 输入偏压： | 1.6µA |
| 电压 - 输入偏移： | 6000µV |
| 电流 - 电源： | 20µA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
MAX9928/MAX9929
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
10
______________________________________________________________________________________
Voltage Output (MAX9929F)
The output voltage equation for the MAX9929_ is given
below:
VOUT = (RSENSE x ILOAD) x (AV)
where VOUT = the desired full-scale output voltage,
ILOAD = the full-scale current being sensed, RSENSE =
the current-sense resistor, AV = MAX9929F voltage
gain (50V/V).
SIGN Output
The current/voltage at OUT indicates magnitude. The
SIGN output indicates the current’s direction. The SIGN
comparator compares RS+ to RS-. The sign output is
high when RS+ is greater than RS- indicating positive
current flow. The sign output is low when RS- is greater
than RS+ indicating negative current flow. In battery-
operated systems, this is useful for determining
whether the battery is charging or discharging. The
SIGN output might not correctly indicate the direction of
load current when VSENSE is between -1.8mV to -1.2mV
(see Figure 2). Comparator hysteresis of 0.6mV pre-
vents oscillation of SIGN output. If current direction is
not needed, leave SIGN unconnected.
Applications Information
Choosing RSENSE
The MAX9928F/MAX9929F operate over a wide variety
of current ranges with different sense resistors. Adjust
the RSENSE value to monitor higher or lower current lev-
els. Select RSENSE using these guidelines:
Voltage Loss: A high RSENSE value causes the
power-source voltage to drop due to IR loss. For
least voltage loss, use the lowest RSENSE value.
Accuracy: A high RSENSE value allows lower cur-
rents to be measured more accurately. This is
because offsets become less significant when the
sense voltage is larger.
Efficiency and Power Dissipation: At high current
levels, the I2R losses in RSENSE might be significant.
Take this into consideration when choosing the resis-
tor value and power dissipation (wattage) rating.
Also, if the sense resistor is allowed to heat up exces-
sively, its value could drift.
Inductance: If there is a large high-frequency com-
ponent to ISENSE, keep inductance low. Wire-wound
resistors have the highest inductance, while metal
film is somewhat better. Low-inductance metal-film
resistors are available. Instead of being spiral
wrapped around a core, as in metal film or wire-
wound resistors, these are a straight band of metal.
They are made in values under 1
Ω.
Use in Systems with Super Capacitors
Since the input common-mode voltage range of the
MAX9928/MAX9929 extends all the way from -0.1V to
28V, they are ideal to use in applications that require
use of super capacitors for temporary or emergency
energy storage systems. Some modern industrial and
automotive systems use multifarad (1F–50F) capacitor
banks to supply enough energy to keep critical sys-
tems alive even if the primary power source is removed
or temporarily disabled. Unlike batteries, these capaci-
tors can discharge all the way down to 0V. The
MAX9928/MAX9929 can continuously help monitor their
health and state of charge/discharge.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliability
testing results, go to Maxim’s website at www.maxim-
ic.com/ucsp
to
find
Application
Note
1891:
Understanding the Basics of the Wafer-Level Chip-
Scale Package (WL-CSP).
Chip Information
PROCESS: BiCMOS
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相关代理商/技术参数 |
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| MAX9929TABS+TG45 | 制造商:Maxim Integrated Products 功能描述:0V TO 28V CMR ISENSE - Tape and Reel |
| MAX9929TAUA+T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX992EKA | 制造商:Maxim Integrated Products 功能描述:HIGH-SPEED MICROPOWER LOW-VOLTAGE - Cut Tape Product |
| MAX992EKA+ | 制造商:Maxim Integrated Products 功能描述:COMPARATOR DUAL R-R I/O 2.75V/5.5V 8PIN SOT-23 - Rail/Tube |
| MAX992EKA+T | 功能描述:校验器 IC Dual uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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